US2675317A - Photographic stripping film for silk screen process - Google Patents

Photographic stripping film for silk screen process Download PDF

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Publication number
US2675317A
US2675317A US304687A US30468752A US2675317A US 2675317 A US2675317 A US 2675317A US 304687 A US304687 A US 304687A US 30468752 A US30468752 A US 30468752A US 2675317 A US2675317 A US 2675317A
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US
United States
Prior art keywords
silk screen
vinyl chloride
film
layer
stripping film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US304687A
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English (en)
Inventor
Carl F Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE521838D priority Critical patent/BE521838A/xx
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US304687A priority patent/US2675317A/en
Priority to FR1081690D priority patent/FR1081690A/fr
Priority to GB22024/53A priority patent/GB735682A/en
Application granted granted Critical
Publication of US2675317A publication Critical patent/US2675317A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/12—Production of screen printing forms or similar printing forms, e.g. stencils
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/805—Photosensitive materials characterised by the base or auxiliary layers characterised by stripping layers or stripping means

Definitions

  • This invention relates to photographic film and particularly to a stripping film for use in the silk screen process.
  • the degree of adhesion, between the light-sensitive emulsion and the film base is rather critical. It must be great enough when the film is dry to hold the emulsion through handling and cutting as well as. keeping at low relative humidities. Adhesion should be sufiicient to keep the exposed emulsion from washing off While the unexposed portions are being removed in the formation of the relief image tobe used: as the stencil. However, the adhesion must not be so great that the base or support of the film cannot be removed after the gelatin stencil has been dried on the silk screen. At this point it is essential that separation between the relief image and the film support take place cleanly and easily so that portions of the stencil are not pulled off the silk when the film base is removed. This is especially important when the silk screen image consists of half-tone dots adhering to only one or two strands of the silk screen mesh.
  • a further object is to provide a subbing technique which furnishes the proper degree of adhesion for use in a film for the silk screen process.
  • a still further object is to provide a subbed film base upon which the gelatin emulsion can be coated and easily removed by use of a suitable solvent after formation of a relief image and transferred to a silk screen.
  • a cellulose ester film base especially a cellulose acetate film base
  • a cellulose acetate film base with successive layers of vinyl chloride-vinyl acetate resinous copolymer of the composition described below, followed by a gelatino-silver halide emulsion layer.
  • the drawing shows in sectional view a film constructed according to my invention.
  • the preferred support for my film is a substantially fully esterif ied cellulose acetate containing about 43.5% by weight. of acetyl group's, although other cellulose esters. may be used such as partially hydrolyzed cellulose acetate or par tially hydrolyzed or fully esterified cellulose propionate, cellulose acetate propionate, etc.
  • the subbing layers are resinous copolymers of vinyl chloride and vinylacetate such asthose copolymers sold under the trade namevinylite.
  • the resinous sub first coated on the support comprises a copolymeroi vinyl chloride, vinyl acetate, and. an c-unsaturated dicarboxylic acid such as maleic or iumaric acid.
  • This resin preferably contains about 86%. by weight vinyl chloride groups, 13% by weight vinyl acetate groups and 1% by weight carboxylic acid groups. It is coated from a solvent such asethylene dichloride or methylenechloride which has a sumcient attack power for the cellulose ester support in order to cause the resin to adhere.
  • This undercoat there is applied asolution of a mixture of the undercoat resin first applied and a vinyl chloride-vinyl acetate resinous copolymer preferably having a higher vinyl chloride content than that of the undercoat first applied.
  • This resinous polymer contains no carboxylic acid groups and comprises a resin containing approximately 87% by weight vinyl chloride groups and 13% by weight vinyl acetate groups, although the vinyl chloride content may range from to 93% by weight.
  • the concentration of this resin in the mixture i from 50% to 90% of the solids content of the solution and the proportion of the undercoat resin containing carboxylic acid groups is from 50% to 10% of the solids content of the mixture.
  • the fine degree of adhesion between the lightsensitive emulsion which is next applied, and the base is attained by the proper mixture of the high vinyl chloride resin, which is incompatible with the emulsion, and the lower chloride carboxyl-containing resin which is compatible. This combination does not adhere to the cellulose acetate base and therefore makes necessary the lower vinyl chloride carboxyl-containing resin undercoat.
  • a cellulose acetate support containing about 43.5% by weight of acetyl groups was coated with a solution of a resinous copolymer containing 86% by weight of vinyl chloride, 13% by weight of vinyl acetate and 1% by weight of dibasic acid groups, the solution having the following composition:
  • the emulsion layer coated on the film is a gelatino-silver halide emulsion layer preferably containing a dispersion of a tanning developing agent and a dispersion of a soft synthetic resin as described in Yackel U. S. application Serial No. 256,243.
  • the resin dispersion contained in the emulsion may be an aqueous dispersion of polymethyl or polyethyl acrylate or a copolymer of ethyl acrylate and acrylom'trile or it may be a dispersion of a copolymer of butyl acrylatestyrene-methacrylamide resin.
  • the emulsion may also contain the usual spreading agents, softening agents such as glycerine and thioglycolic amide and light absorbing dyes for controlling contrast and light penetration of the emulsion.
  • softening agents such as glycerine and thioglycolic amide
  • light absorbing dyes for controlling contrast and light penetration of the emulsion.
  • the complete structure may be used in a'process such as that described in Yackel application Serial No. 256,243.
  • a photographic stripping film comprising in order, a cellulose ester support, a layer of a resinous copolymer of vinyl chloride, vinyl acetate and an nip-unsaturated dicarboxylic acid, a layer containing a mixture of from to 10% of said resinous copolymer and from 50% to of a resinous copolymer containing approximately 87% vinyl chloride and the remainder vinyl acetate, and a. gelatino-silver halide emulsion layer; V
  • a photographic stripping film comprising in order, a cellulose acetate support, a layer of a resinous copolymer containing by weight ap-' proximately 86% vinyl chloride, 13% vinyl acetate and 1% dibasic carboxylic acid, a layer,

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US304687A 1952-08-16 1952-08-16 Photographic stripping film for silk screen process Expired - Lifetime US2675317A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE521838D BE521838A (nl) 1952-08-16
US304687A US2675317A (en) 1952-08-16 1952-08-16 Photographic stripping film for silk screen process
FR1081690D FR1081690A (fr) 1952-08-16 1953-07-28 Nouveau produit photographique et ses applications notamment à l'obtention de réserves sur pochoirs d'étamine
GB22024/53A GB735682A (en) 1952-08-16 1953-08-10 Improvements in photographic stripping films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US304687A US2675317A (en) 1952-08-16 1952-08-16 Photographic stripping film for silk screen process

Publications (1)

Publication Number Publication Date
US2675317A true US2675317A (en) 1954-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
US304687A Expired - Lifetime US2675317A (en) 1952-08-16 1952-08-16 Photographic stripping film for silk screen process

Country Status (4)

Country Link
US (1) US2675317A (nl)
BE (1) BE521838A (nl)
FR (1) FR1081690A (nl)
GB (1) GB735682A (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245792A (en) * 1959-10-03 1966-04-12 Azoplate Corp Light sensitive polycarbonamide coatings for screen printing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462151A (en) * 1946-09-23 1949-02-22 Du Pont Photographic elements having hydrophilic polyvinyl acetal colloid sublayers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462151A (en) * 1946-09-23 1949-02-22 Du Pont Photographic elements having hydrophilic polyvinyl acetal colloid sublayers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245792A (en) * 1959-10-03 1966-04-12 Azoplate Corp Light sensitive polycarbonamide coatings for screen printing

Also Published As

Publication number Publication date
FR1081690A (fr) 1954-12-22
BE521838A (nl)
GB735682A (en) 1955-08-24

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